Patched libotr, fixing an issue that could lead to remote code execution.

Updated libpurple to 2.10.12.

What is new in version 1.5.10.1:

Updated Sparkle to 1.13.1, fixing a security issue that can lead to disclosure of local files or remote code execution.

Set Sparkle update URL back to HTTPS.

What is new in version 1.5.10:

Updated libpurple to 2.10.9, fixing many security issues.

Updated the PSMTabBarControl framework, used in Adium for tabs:
Fixed an issue which occurred when dragging a conversation window into an existing tabbed conversation window and which caused Adium to become unresponsive. (#16281)
Fixed an issue causing tabs/windows to disappear when being dragged. (#15414, #15518, #15822, #16305)
Fixed an issue where tabs would disappear after several hours. (#16262)
Fixed visual glitches on bottom tabs seen on Retina Displays. (#16074)
Tabs now use all the space in the tab bar. (#7690)
Fixed tabs not being spoken by VoiceOver. (#16088)

Fixed a problem that could cause high CPU load when a connection is lost. (#16431)

Fixed a bug that can cause disconnects when using a Retina Mac with an external screen. (Johannes Loepelmann) (#16552)